it doesn’t appear to be easy to do either of those, from some quick testing. Looks like the <p></p> tags have bottom spacing which is causing the issue, mainly, at least in lemmy’s case. weird.

i think if you put less whitespace in between it will format a bit better?

• A
• B
  • Sub 1
  • Sub 2
• C
  • Another Sub 1
  • Another Sub 2
• D
• E

lemmy uses clockwerk i believe, there’s a few out there for rust.

second for aCalendar+. been using the paid version for a few years now with a self hosted nextcloud instance. works great! works great with other calendars too (google, etc).

I think they broke federation with non lemmy instances in v0.18.0, since the same thing happens with lemmy.ca.

it could be that the community already exists? or not allowed characters? lemmy doesn’t always show a proper error messages in a lot of cases.